org.anchoranalysis.core.identifier.provider.store

Class LazyEvaluationStore<T>

Object

LazyEvaluationStore<T>

Type Parameters:

T - item-type in the store

All Implemented Interfaces:

NamedProvider<T>, NamedProviderStore<T>

public class LazyEvaluationStore<T>
extends Object
implements NamedProviderStore<T>

Items are evaluated only when they are first needed. The value is thereafter stored.

Author:

Owen Feehan

Constructor Summary

Constructors

Constructor and Description
LazyEvaluationStore(String storeDisplayName)

Method Summary

Modifier and Type	Method and Description
void	add(String identifier, StoreSupplier<T> supplier)
T	getException(String key) Retrieves the item if it exists, or throws an exception if it doesn't exist.
Optional<T>	getOptional(String key) Retrieves the item if it exists, or returns empty() if it doesn't exist.
Set<String>	keys() Returns a set of keys associated with the provider.
Set<String>	keysEvaluated()

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface NamedProvider

getArbitraryElement, isEmpty

Constructor Detail

LazyEvaluationStore

public LazyEvaluationStore(String storeDisplayName)

Method Detail

getException

public T getException(String key)
               throws NamedProviderGetException

Description copied from interface: NamedProvider

Retrieves the item if it exists, or throws an exception if it doesn't exist.

Specified by:

getException in interface NamedProvider<T>

Throws:

NamedProviderGetException

getOptional

public Optional<T> getOptional(String key)
                        throws NamedProviderGetException

Description copied from interface: NamedProvider

Retrieves the item if it exists, or returns empty() if it doesn't exist.

Note that a 'key' might still throw an exception for another reason (but never because a particular key is absent).

Specified by:

getOptional in interface NamedProvider<T>

Throws:

NamedProviderGetException

keysEvaluated

public Set<String> keysEvaluated()

keys

public Set<String> keys()

Description copied from interface: NamedProvider

Returns a set of keys associated with the provider.

There's no guarantee that it refers to all valid keys.

Specified by:

keys in interface NamedProvider<T>

add

public void add(String identifier,
                StoreSupplier<T> supplier)
         throws OperationFailedException

Specified by:

add in interface NamedProviderStore<T>

Throws:

OperationFailedException